NPK Insider Trading

Net Selling · 180d
Open-Market Buys (180d)
$0
0 insiders
Open-Market Sells (180d)
$418K
2 insiders
Net Insider Flow
-$418K
open market, 180d
Reporting Insiders
2
2 P/S transactions
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Build on these Form 4 transactions

The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.

Recent Form 4 Transactions

100 shown
DateInsiderRoleActionSharesPriceValue
Apr 30, 2026Morgan Jeffery AlanVP-ENGINEERINGTax withholding(F)349$139.84$49K
Mar 17, 2026Peuse David JCFO & TREASURERSell(S)500$140.16$70K
Mar 16, 2026Morgan Jeffery AlanVP-ENGINEERINGTax withholding(F)100$131.58$13K
Mar 16, 2026Peuse David JCFO & TREASURERTax withholding(F)78$131.58$10K
Mar 16, 2026MacKenzie John Roderick JRVP-SALESTax withholding(F)62$131.58$8K
Mar 16, 2026Frederick Douglas JCOO, VP, SECRETARY, DirectorTax withholding(F)36$131.58$5K
Mar 11, 2026Lieble Randy FDirectorSell(S)2K$143.97$348K
Jan 2, 2026Stienessen Joseph GDirectorGrant(A)100$0
Jan 2, 2026Quinn Patrick JDirectorGrant(A)100$0
Jan 2, 2026Lieble Randy FDirectorGrant(A)100$0
Jan 2, 2026Morgan Jeffery AlanVP-ENGINEERINGGrant(A)234$0
Jan 2, 2026MacKenzie John Roderick JRVP-SALESGrant(A)327$0
Jan 2, 2026Frederick Douglas JCOO, VP, SECRETARY, DirectorGrant(A)386$0
Jan 2, 2026Peuse David JCFO & TREASURERGrant(A)327$0
Mar 17, 2025Frederick Douglas JCOO, VP, SECRETARY, DirectorTax withholding(F)96$89.01$9K
Mar 17, 2025Peuse David JTREASURERTax withholding(F)19$89.01$2K
Mar 17, 2025Morgan Jeffery AlanVP-ENGINEERINGTax withholding(F)78$89.01$7K
Jan 2, 2025Frederick Douglas JCOO, VP, SECRETARY, DirectorGrant(A)406$0
Jan 2, 2025MacKenzie John Roderick JRVP-SALESGrant(A)406$0
Jan 2, 2025Morgan Jeffery AlanVP-ENGINEERINGGrant(A)254$0
Jan 2, 2025Peuse David JTREASURERGrant(A)254$0
Jan 2, 2025Lieble Randy FDirectorGrant(A)106$0
Jan 2, 2025Quinn Patrick JDirectorGrant(A)106$0
Jan 2, 2025Stienessen Joseph GDirectorGrant(A)106$0
Jan 2, 2025Cohen Maryjo RCEO, Director, 10% OwnerGrant(A)1K$0
Mar 15, 2024Morgan Jeffery AlanVP-ENGINEERINGTax withholding(F)29$76.06$2K
Mar 15, 2024Peuse David JTREASURERTax withholding(F)11$76.06$837
Jan 2, 2024Lieble Randy FDirectorGrant(A)130$0
Jan 2, 2024Quinn Patrick JDirectorGrant(A)130$0
Jan 2, 2024Stienessen Joseph GDirectorGrant(A)130$0
Jan 2, 2024Frederick Douglas JCOO, VP, SECRETARY, DirectorGrant(A)498$0
Jan 2, 2024MacKenzie John Roderick JRVP-SALESGrant(A)435$0
Jan 2, 2024Peuse David JTREASURERGrant(A)186$0
Aug 17, 2023Peuse David JTREASURERSell(S)43$76.18$3K
Aug 17, 2023Peuse David JTREASURERSell(S)150$76.18$11K
Mar 15, 2023Morgan Jeffery AlanVP-ENGINEERINGTax withholding(F)34$74.48$3K
Mar 15, 2023Peuse David JTREASURERTax withholding(F)22$74.48$2K
Jan 20, 2023Jeffers Richard LVP-SALESTax withholding(F)378$71.05$27K
Jan 5, 2023Morgan Jeffery AlanVP-ENGINEERINGGrant(A)482$0
Jan 5, 2023Peuse David JTREASURERGrant(A)292$0
Jan 5, 2023Frederick Douglas JCOO, VP, SECRETARYGrant(A)1K$0
Jan 5, 2023Lieble Randy FDirectorGrant(A)146$0
Jan 5, 2023Quinn Patrick JDirectorGrant(A)146$0
Jan 5, 2023Stienessen Joseph GDirectorGrant(A)146$0
Jan 5, 2023Cardozo Richard NDirectorGrant(A)146$0
Jan 5, 2023Cohen Maryjo RCEO, Director, 10% OwnerGrant(A)2K$0
Jan 5, 2023Jeffers Richard LVP-SALESGrant(A)438$0
Mar 16, 2022Peuse David JTREASURERTax withholding(F)13$79.62$1K
Mar 16, 2022Morgan Jeffery AlanVP-ENGINEERINGTax withholding(F)16$79.62$1K
Mar 16, 2022Frederick Douglas JCOO, VP, SECRETARYTax withholding(F)380$79.62$30K
Jan 6, 2022Lieble Randy FDirectorGrant(A)117$0
Jan 6, 2022Quinn Patrick JDirectorGrant(A)117$0
Jan 6, 2022Cardozo Richard NDirectorGrant(A)117$0
Jan 6, 2022Stienessen Joseph GDirectorGrant(A)117$0
Dec 31, 2021Cohen Maryjo RCEO, Director, 10% OwnerGrant(A)1K$0
Dec 31, 2021Frederick Douglas JCOO, VP, SECRETARYGrant(A)988$0
Dec 31, 2021Jeffers Richard LVP-SALESGrant(A)497$0
Dec 31, 2021Peuse David JTREASURERGrant(A)304$0
Dec 31, 2021Morgan Jeffery AlanVP-ENGINEERINGGrant(A)402$0
Mar 16, 2021Peuse David JTREASURERTax withholding(F)17$104.77$2K
Mar 16, 2021Morgan Jeffery AlanVP-ENGINEERINGTax withholding(F)87$104.77$9K
Jan 11, 2021Stienessen Joseph GDirectorGrant(A)105$0
Jan 11, 2021Cardozo Richard NDirectorGrant(A)105$0
Jan 11, 2021Quinn Patrick JDirectorGrant(A)105$0
Jan 11, 2021Lieble Randy FDirectorGrant(A)105$0
Dec 31, 2020Jeffers Richard LVP-SALESGrant(A)339$0
Dec 31, 2020Cohen Maryjo RCEO, Director, 10% OwnerGrant(A)1K$0
Dec 31, 2020Peuse David JTREASURERGrant(A)226$0
Dec 31, 2020Morgan Jeffery AlanVP-ENGINEERINGGrant(A)339$0
Dec 31, 2020Frederick Douglas JCOO, VP, SECRETARYGrant(A)408$0
Jan 2, 2020Morgan Jeffery AlanVice President-EngineeringGrant(A)226$0
Dec 31, 2019Cohen Maryjo RChair of Board, President, CEO, Director, 10% OwnerGrant(A)1K$0
Dec 31, 2019Frederick Douglas JCOO and Vice PresidentGrant(A)791$0
Dec 31, 2019Jeffers Richard LVice President-SalesGrant(A)339$0
Dec 31, 2019Peuse David JTreasurerGrant(A)56$0
Sep 3, 2019Lieble Randy FDirectorTax withholding(F)2K$85.95$194K
Mar 20, 2019Quinn Patrick JDirectorBuy(P)100$107.82$11K
Dec 31, 2018Cohen Maryjo RChair of Board, President, CEO, Director, 10% OwnerGrant(A)855$0
Dec 31, 2018Lieble Randy FVice President, Treasurer, CFO, DirectorGrant(A)757$0
Dec 31, 2018Frederick Douglas JCOO and Vice PresidentGrant(A)748$0
Dec 31, 2018Morgan Jeffery AlanVice President-EngineeringGrant(A)85$0
Dec 31, 2018Jeffers Richard LVice President-SalesGrant(A)256$0
Jul 10, 2018Lieble Randy FVice President, Treasurer, CFO, DirectorGrant(A)363$0
May 15, 2018Cardozo Richard NDirectorBuy(P)200$101.25$20K
Mar 20, 2018Quinn Patrick JDirectorBuy(P)100$99.85$10K
Mar 20, 2018Cardozo Richard NDirectorBuy(P)200$99.85$20K
Dec 31, 2017Cohen Maryjo RChair of Board, President,CEO, Director, 10% OwnerGrant(A)1K$0
Dec 31, 2017Lieble Randy FVice President, Treasurer, CFO, DirectorGrant(A)1K$0
Dec 31, 2017Frederick Douglas JGeneral Counsel & secretaryGrant(A)260$0
Dec 31, 2017Morgan Jeffery AlanVice President-EngineeringGrant(A)100$0
Dec 31, 2017Jeffers Richard LVice President-SalesGrant(A)100$0
Nov 14, 2017Cardozo Richard NDirectorBuy(P)100$113.85$11K
Nov 14, 2017Cardozo Richard NDirectorBuy(P)100$115.90$12K
Aug 15, 2017Cardozo Richard NDirectorBuy(P)200$107.95$22K
Feb 16, 2017Cohen Maryjo RChair of Board, President, CEO, DirectorGrant(A)939$0
Feb 16, 2017Lieble Randy FVice President, Treasurer, CFO, DirectorGrant(A)3K$0
Feb 16, 2017Frederick Douglas JGeneral counsel & secretaryGrant(A)1K$0
Jan 25, 2017Lieble Randy FVice President, Treasurer, CFO, DirectorGrant(A)785$0
Jan 25, 2017Frederick Douglas JGeneral counsel & secretaryGrant(A)236$0
Jan 25, 2017Ahneman Spencer WVice PresidentGrant(A)93$0

Data Source

Insider transactions sourced from SEC EDGAR Form 4 filings, normalized within minutes of acceptance. "Buy"/"Sell" mark open-market transactions (codes P/S), the tradeable signal. Awards, option exercises and tax-withholding are shown with their raw code. All data is public domain.

Coverage: Form 4 filings indexed 2006-01-022026-08-28. Earlier history is backfilling; this window widens as it deepens.

Programmatic access via the Arkolith API & MCP server (insider.transactions, insider.company).